DE740726C - Chrome-manganese steels for objects that have to be resistant to intergranular corrosion - Google Patents

Chrome-manganese steels for objects that have to be resistant to intergranular corrosion

Info

Publication number
DE740726C
DE740726C DEST60593D DEST060593D DE740726C DE 740726 C DE740726 C DE 740726C DE ST60593 D DEST60593 D DE ST60593D DE ST060593 D DEST060593 D DE ST060593D DE 740726 C DE740726 C DE 740726C
Authority
DE
Germany
Prior art keywords
chrome
resistant
objects
intergranular corrosion
steels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEST60593D
Other languages
German (de)
Inventor
Dr Chem Leopold Schaeben
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Buderus Edelstahl GmbH
Original Assignee
Stahlwerke Roechling Buderus AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stahlwerke Roechling Buderus AG filed Critical Stahlwerke Roechling Buderus AG
Priority to DEST60593D priority Critical patent/DE740726C/en
Application granted granted Critical
Publication of DE740726C publication Critical patent/DE740726C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Description

Chrom-Mangan-Stähle für Gegenstände, die gegen interkristalline Korrosion beständig sein müssen Chrom-Mangan-Stähle haben als Ersatz für Chrom-Nickel-Stähle eine weite Verbreitung gefunden, insbesondere dort, wo Körrosions-und Zunderbeständigkeit der daraus bergestellten Gegenstände gefordert wird. Man hat schon versucht, ähnlich wie bei den Chrom-Nickel-Stählen eine Beständigkeit gegen die interkristalline Korrosion dadurch zu erlangen, daß man den Chrom-Mangan-Stählen kohlenstoffabbindende Elemente wie Titan., Tantal und Niob, Stickstoff o. dgl. zusetzte.Chromium-manganese steels for objects against intergranular corrosion Chromium-manganese steels must be resistant to replace chromium-nickel steels found widespread use, especially where corrosion and scaling resistance the objects retrieved from it is required. One has already tried to do something similar as with chrome-nickel steels, resistance to intergranular corrosion by adding carbon-binding elements to the chromium-manganese steels such as titanium, tantalum and niobium, nitrogen or the like.

Man hat auch schon vorgeschlagen, die interkristalline Korrosion bei Chrom-Nickel-Stählen dadurch zu vermeiden, daß man den Kohlenstoffgehalt unter o,07 °(o hält, und hat diese Maßnahme auch -bei Chrom-Mangan-Stählen für anwendbar gehalten. Ist aber schon die Erschmelzung eines Chrom-Nickel-Stahles mit so niedrigem Kohlenstoffgehalt schwierig, so bereitet es besondere Schwierigkeiten, bei Chrom-Mangan-Stählen einen derart niedrigen Kohlenstoff einzuhalten. Es wurde überraschenderweise gefunden, daß ferritisch-austenitische und rein austenitische Chrom-Mangan-Stähle gegen interkristalline Korrosion beständig sind, wenn deren Kohlenstoffgehalt höchstens o,og °/a beträgt. Erfindungsgemäß wird deshalb als Werkstoff für Gegenstände, die gegen interkristalline Korrosion beständig sein müssen, die Verwendung von Stählen folgender Zusammensetzung vorgeschlagen: 0,07 bis o,og °/" Kohlenstoff, - 25 % Chrom, 5 - 40 % Mangan, Rest Eisen mit den üblichen Verunrei- nigungen. Diese Stähle können noch zur Verbesserung der chemischen Eigenschaften bis zu 5% Nickel, Molybdän, Kobalt und bis zu 3 % Kupfer, Silizium, Aluminium einzeln oder. zu mehreren enthalten.It has also been proposed to avoid intergranular corrosion in chromium-nickel steels by keeping the carbon content below 0.07 ° (o, and this measure has also been considered applicable to chromium-manganese steels. But it is Even the melting of a chromium-nickel steel with such a low carbon content is difficult, so it is particularly difficult to maintain such a low carbon in chromium-manganese steels.It has surprisingly been found that ferritic-austenitic and purely austenitic chromium-manganese steels are resistant to intergranular corrosion if their carbon content does not exceed o, og ° / a. According to the invention, therefore, the use of steels of the following composition is proposed as a material for objects that must be resistant to intergranular corrosion: 0.07 to og ° / "carbon, - 25% chromium, 5 - 40% manganese, Remaining iron with the usual impurities inclinations. These steels can be used to improve the chemical properties up to 5% nickel, molybdenum, cobalt and up to 3% copper, silicon, or aluminum individually. to contain several.

Claims (2)

PATEtVTANSPRÜcHE: i. Die- Verwendung ferritisch-austeniti- scher und rein austenitischer Chrom-Man- gan-Stähle reit
o,o7 bis o,og °/° Kohlenstoff, 5 - # 5 °/° Chrom, 5 - 40 °% .Mangan, Rest Eisen mit den üblichen Veruni;ci;-.: nigungen
als Werkstoff .für Gegenstände. die gegen interkristalline Korrosion beständig sein müssen. PATENT CLAIMS: i. The use of ferritic-austenitic shear and purely austenitic chrome man- gan steels riding
o, o7 to o, og ° / ° carbon, 5 - # 5 ° / ° chrome, 5 - 40%. Manganese, Remainder iron with the usual veruni; ci; - .: inclinations
as a material for objects. which must be resistant to intergranular corrosion. 2. Die Verwendung von Legierungen, wie sie im Anspruch i genannt sind, die jedoch noch bis zu 5 °;° Nickel, Moivbdän, Kobalt und bis zu 10/0 Kupfer, Silizium, Aluminium einzeln oder zu mehreren enthalten, für den. Zweck nach Anspruch i. Zur Abgrenzung des: Anvieldungsgegenstan- des .vom Stand der Technik sind in2 Ertei- lungsverfahren in Betracht gezogen «-orden: _'.ritische Patentschriften 'r.:ofigoz und 5o8 Gig; ., »Chem. Zentra'bl.« (ig4(j) I S. igoo und 206a,- Grützaer: »E `.is°äi- und Stahllegierungen «, . Erg.-Band 1. 37.eil (1g40) S. 35, 40, 4a, 77 und 2ö6; »I',i2 chemische Fabrik« 1o (, 1,,;i7) S. 281; Ragwtz: >,Die Edel-' ählet: (1934) S.246 und y47.
2. The use of alloys as mentioned in claim i, which, however, still contain up to 5 °; ° nickel, Moivbdän, cobalt and up to 10/0 copper, silicon, aluminum individually or in groups for the. Purpose according to claim i. To delimit the: subject of application state-of-the-art technology procedure considered "-order: _ '. ritic patents' r.:ofigoz and 508 gig; ., “Chem. Zentra'bl. «(Ig4 (j ) I S. igoo and 206a, - Grützaer: »E` .is ° äi and steel alloys «, . Result Volume 1. 37.eil (1g40) pp. 35, 40, 4a, 77 and 2ö6; "I ', i2 chemical factory" 1o ( , 1 ,,; i7) p. 281; Ragwtz:>, Die Edel- 'ählet: (1934) p.246 and y47.
DEST60593D 1941-03-25 1941-03-25 Chrome-manganese steels for objects that have to be resistant to intergranular corrosion Expired DE740726C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEST60593D DE740726C (en) 1941-03-25 1941-03-25 Chrome-manganese steels for objects that have to be resistant to intergranular corrosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST60593D DE740726C (en) 1941-03-25 1941-03-25 Chrome-manganese steels for objects that have to be resistant to intergranular corrosion

Publications (1)

Publication Number Publication Date
DE740726C true DE740726C (en) 1943-10-27

Family

ID=7468366

Family Applications (1)

Application Number Title Priority Date Filing Date
DEST60593D Expired DE740726C (en) 1941-03-25 1941-03-25 Chrome-manganese steels for objects that have to be resistant to intergranular corrosion

Country Status (1)

Country Link
DE (1) DE740726C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB506905A (en) * 1938-01-22 1939-06-06 Krupp Ag Improvements in the manufacture of parts of chemical apparatus and other articles from chromium-manganese steel alloys
GB508619A (en) * 1937-05-07 1939-07-04 Krupp Ag Improvements in corrosion-resistant steel alloys

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB508619A (en) * 1937-05-07 1939-07-04 Krupp Ag Improvements in corrosion-resistant steel alloys
GB506905A (en) * 1938-01-22 1939-06-06 Krupp Ag Improvements in the manufacture of parts of chemical apparatus and other articles from chromium-manganese steel alloys

Similar Documents

Publication Publication Date Title
Singhal et al. The formation of ferrite and sigma-phase in some austenitic stainless steels
DE740726C (en) Chrome-manganese steels for objects that have to be resistant to intergranular corrosion
Erisir et al. Effect of precipitation on hot formability of high nitrogen steels
DE1758660B1 (en) USE A NICKEL CHROME OR NICKEL CHROME IRON ALLOY
US3929520A (en) Corrosion-resistant austenitic-ferritic stainless steel
DE2124391B2 (en) USE OF A STAINLESS STEEL AS A MATERIAL FOR THE MANUFACTURE OF COMPONENTS THAT ARE RESISTANT TO PITCH CORROSION IN AN ENVIRONMENT CONTAINING CHLORIDIONS
DE681719C (en) Material for welding rods for the production of non-hardenable, fine-grained and stretchable welding on objects made of ferritic chrome steels
EP0516955A1 (en) Corrosion resistant austenitic steel with high silicon content
DE1533281C3 (en) Use of a nickel-chromium alloy
DE917674C (en) Steel for seals
DE541039C (en) Steel alloys with high resistance to attack by acids, to rusting and especially to scaling
DE896659C (en) Steel for objects, the production of which requires a high degree of cold forming of the material
DE585151C (en) Nickel-iron alloy spring, especially for thermocompensated oscillating systems
DE1558635B2 (en) High-strength, stable austenitic corrosion-resistant steel for the production of evaporator tubes and superheater tubes
DE971370C (en) Steel alloys for items resistant to stress corrosion
DE941797C (en) Ferritic chromium-aluminum, chromium-silicon and chromium-aluminum-silicon steels for objects that have to endure a high permanent load above 800íÒ
DE698683C (en) Steel for objects that have to be resistant to the decarburizing attack of gases
AT233038B (en) Austenitic, corrosion-resistant chromium-manganese-nitrogen steels for the production of objects that are resistant to stress corrosion cracking
DE908380C (en) Use of austenitic steel alloys
DE908740C (en) Chromium-manganese steels for objects, the production of which requires a high degree of cold forming of the material
DE102017129218A1 (en) WELDING MATERIAL
AT148124B (en) Manufacture of forged or cast objects, which in the polished state must be absolutely rustproof, alkali-resistant and scale-resistant as well as highly wear-resistant, made of iron alloys containing carbon, chromium, molybdenum and possibly nickel.
DE102020132909A1 (en) nickel alloy
AT116860B (en) Nickel-tungsten steel.
DE1183696B (en) Use of austenitic, corrosion-resistant chromium-manganese-nitrogen steels for the production of objects that are resistant to stress corrosion cracking